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JAMES MONACH, or PHILADELPHIA; ASSIGNOR To HIMSELF, JEFFERY' HART, AND ROBERT THORP, or GONSHOHOGKEN, PENNSYLVANIA,

- Letters Patent No. 74,113,,datedl 'bmary 4,1868.

ma -mm m TREATING JUTE-FIBBE.

TO ALL WHOM IT MAY CONCERN:

, 'Be it known that I, JAMES LION-ACE, (a-ssignor to myself, Jeifery Hart,and Robert Thorp,) of Philadelphia, Pennsylvania, have invented an Improved Substitute for W001 and Similar Fibres; and I do hereby declare the following to be a full, clear, and exact description of the some.

My invention consistsof jute treatedwithcaiistic allcali, of about the strength of 60 Twadells hydrom eter, substantially as described hereafter, so as to render it available as a substituteforor to'be mixed withwool and other fibres, in the manufacture of yarna'nd textile fabrics.

In order to enable others to make my invention, I will now proceed to describe anode of carrying the same into effect. I i

I have ascertained, after'repeated trials that jute-fibres may be rendered so tough and elastic as to be but little if any inferior, as regards these qualities, to wool, by boiling the fibres in'and contractiiig and otherwise changing them by caustic alkali, of about thestrengthof 60 of Twadells-hydrometerl After being boiled for about two'hours, the mass of fibres is removed from the vessel in which they'nrcre boiled, washed in clean water, then steeped for/1. short timein a weak solution of sulphuric acid and Water, or other liquid, which will neutralize or remove the alkali, after which it is again washed in water, and afterwards dried, when it is ready for'the manufacturer as a substitute for tool, which it very closely resembles both in appearance and quality of fibre. i i

The-improved fibre thus produced admits of being piclted and. carded by machinery similar to that used in operating on wool, and can be bleached or dyed, and spun into yarn, and converted into substantial.textile fabrics, either alone or in conjunction with wool orothcr fibre s.

- I am aware that it has heretofore been usual to boil jute and otherlfibres, prior to dyeing and manufacturing intoyarn, in a solution of alkali, of a strength i not eirceeding three or four degrees Twadells hydrometer. I have 'found, however, that the jute-fibre is not contracted and changed in character so as to resemble and be an eiiicient substitute for wool without it is boiled in caustic alkali of a strength of about 60 Twadells hydrometer. Without, therefore, claiming broadlya fibre produced by the action of an alkaline solution upon jute-fibre,

I claim as my invention; and desire to secure by Letters Patent, as a'new manufacture- Jute-fibres treated withcaustic alkali, of a strength of about 60, substantially as described, for the pur-' pose specified. V i i In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

' JAMES MONACH.

.Witnessesi H. HOWSON, O, Pmcn. 

